TV-Series
Description
Isuzu Sento is the main female protagonist of the narrative, introduced as a beautiful teenage girl who transfers into the protagonist's class. Her appearance is marked by her long, waist-length golden-brown hair, which she typically wears in a large ponytail, and her distinctive tan-colored eyes. Despite her youthful and attractive appearance, her demeanor is far more serious and disciplined.

Her background reveals that she is not an ordinary human but originates from the magical land of Mapleland. Within this realm, she holds the distinguished rank of First Royal Guard. Her true, full name is Isuzuruha Centollusia (or Saint Lucia). She was dispatched to the human world on a critical mission to save Amagi Brilliant Park, a decrepit amusement park that serves as a vital source of magical energy, or animus, for the inhabitants of Mapleland. Before the events of the story, Sento served as the park's acting manager for an entire year, but her rigid approach proved unsuccessful, leading to financial deficit and low employee morale.

Personality-wise, Sento is the epitome of a stoic and blunt individual, often described as a kuudere. Her military background as a royal guard heavily influences her behavior, making her inflexible, overly serious, and prone to using direct force to solve problems. Her most iconic, and often comedic, trait is her tendency to respond to frustration or refusal by magically summoning a muzzle-loading musket, which she points at anyone who does not comply with her requests. Beneath this cold and expressionless exterior, however, she is actually quite sensitive and prone to embarrassment, though she struggles greatly to express these softer emotions. She also has a unique biological quirk stemming from her lineage, which includes kappa ancestry, requiring her to take three baths a day to feel well, and she has a noted fondness for cucumbers. In a further attempt to seem more approachable, she often uses bizarre, nonsensical monster emoticons when sending text messages, which has the opposite effect of confusing the recipients.

Her primary motivation throughout the story is the survival of Amagi Brilliant Park and the well-being of its owner, Princess Latifa Fleuranza, to whom she is deeply loyal as a royal guard and close friend. Sento is the catalyst for the plot, as she forcibly recruits the arrogant but brilliant student Seiya Kanie to become the new park manager. Using her musket to persuade him, she takes him on a mandatory date to the dilapidated park, leading to his eventual appointment as her superior. Her role in the story is primarily that of Kanie's capable and dedicated secretary, supporting his managerial strategies while acting as the no-nonsense enforcer of the park's operations.

Key relationships define her development. Her working relationship with Kanie is central; it begins as a forced, professional arrangement but gradually evolves as she develops romantic feelings for him. She shows her affection through subtle signs of jealousy when he shows interest in other women and through her insecurity when he plans to hire more staff, fearing she will be replaced. The OVA depicts her flustered efforts to give him a birthday present, highlighting her difficulty in expressing care. Her relationship with Princess Latifa is built on unwavering devotion, as Sento serves as her protector and one of her closest confidants.

Sento exhibits notable development over the course of the story. Initially presented as a socially awkward, inflexible soldier who cannot effectively manage people, she learns to soften her approach through her interactions with Kanie. Her hidden vulnerabilities and romantic interests begin to surface, revealing a sensitive young woman behind the military facade. In the light novel continuity, this development culminates in her finally acknowledging her feelings and forming a romantic relationship with Kanie, putting aside her past bluntness for a more open emotional connection.

Regarding abilities, Sento possesses a unique magical power: the ability to summon a magical muzzle-loading musket named Steinberger from any exposed part of her skin at will. The musket does not require conventional reloading and can fire a variety of specialized, non-lethal magical bullets. These include Pain Bringer bullets, which inflict sharp, debilitating pain without physical injury; Forgotten Realm bullets, which cause short-term memory loss; and more potent rounds like Exorcising bullets, designed to eliminate magical and spiritual entities. Beyond her combat abilities, she is also highly competent in administrative tasks and crisis management, demonstrating a calm and efficient ability to organize emergency response efforts under pressure. Her marksmanship is flawless, and she is said to never miss her target.
Cast